Fair Value of Financial Instruments and Fair Value Measurements (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Assets:
Loans held for sale	$ 9,098		$ 9,098
Gain (Loss) on loans held for sale, net	1,219	$ 2,013	4,418	$ 6,207
Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale					$ 14,465
Gain (Loss) on loans held for sale, net					(10)
Fair Value, Measurements, Nonrecurring [Member] \| Commercial loans [Member]
Assets:
Impaired loans	39		39
Total (losses)/gains On Impaired Loans Fair Value Disclosure			(13)
Fair Value, Measurements, Nonrecurring [Member] \| Agriculture loans [Member]
Assets:
Impaired loans	449		449
Total (losses)/gains On Impaired Loans Fair Value Disclosure			(2)
Fair Value, Measurements, Nonrecurring [Member] \| Consumer loans [Member]
Assets:
Impaired loans	26		26		16
Total (losses)/gains On Impaired Loans Fair Value Disclosure			(12)		6
Fair Value, Measurements, Nonrecurring [Member] \| One-to-four family residential real estate [Member]
Assets:
Impaired loans	540		540		266
Total (losses)/gains On Impaired Loans Fair Value Disclosure			0		(137)
Fair Value, Inputs, Level 1 [Member]
Assets:
Loans held for sale	0		0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale					0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Commercial loans [Member]
Assets:
Impaired loans	0		0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Agriculture loans [Member]
Assets:
Impaired loans	0		0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Consumer loans [Member]
Assets:
Impaired loans	0		0		0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| One-to-four family residential real estate [Member]
Assets:
Impaired loans	0		0		0
Fair Value, Inputs, Level 2 [Member]
Assets:
Loans held for sale	9,098		9,098
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale					14,465
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Commercial loans [Member]
Assets:
Impaired loans	0		0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Agriculture loans [Member]
Assets:
Impaired loans	0		0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Consumer loans [Member]
Assets:
Impaired loans	0		0		0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| One-to-four family residential real estate [Member]
Assets:
Impaired loans	0		0		0
Fair Value, Inputs, Level 3 [Member]
Assets:
Loans held for sale	0		0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale					0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Commercial loans [Member]
Assets:
Impaired loans	39		39
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Agriculture loans [Member]
Assets:
Impaired loans	449		449
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Consumer loans [Member]
Assets:
Impaired loans	26		26		16
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| One-to-four family residential real estate [Member]
Assets:
Impaired loans	$ 540		$ 540		$ 266